Accompanied by Speaker Sindh Assembly Nisar Ahmed Khuhro, Kumar laid floral wreaths at the mazars and stood silent for a while to pay homage to the PPP leaders.
Kumar, who arrived in Karachi on November 9, will also travel to Lahore and Islamabad during his week-long goodwill visit to Pakistan.
Earlier, on their arrival at Moen-Jo-Daro airport in Larkana from Karachi by a special aircraft, Kumar and his 12-member delegation were welcomed by school students and officials of the district administration, state-run APP news agency reported.
Yesterday, Kumar visited mausoleum of Mohammad Ali Jinnah to pay homage to the founder of Pakistan.